CAtALOGtTE. 
323 
times 1' long) and covered with divergent branched subverticillate prickles ; 
nut 6" in diameter, obtusely triangular, glabrous. — California and Oregon, 
Washoe Mountains, Nevada, above Carson City; 6,500 feet altitude. (1,087.) 
BETULACE^. 
Betula occiDENTALis, Hook. Flor. Bor. A^ner. 2. 155. Branches dark 
reddish-brown, copiously sprinkled with resinous warts ; leaves 1-li' long, 
9-15" wide, thin, broadly ovate, acute, truncate at base or sometimes sub- 
cuneate or slightly cordate, with rarely more than four pairs of nerves, smooth 
and resinous above or minutely appressed-hairy, lighter-colored beneath, 
usually with scattered hairs upon the petioles, margins and veins, not punc- 
tate, somewhat obscurely lobed or doubly toothed, the serratures short and 
glandularly mucronate ; petioles slender, 3-5" long ; fruiting ameuts broad- 
cylindrical, 1' long ; peduncles suberect, leafy, 3-5" long ; scales pubescent, 
ciliate, the lateral lobes divergent, quadrangular ; seed with wings twice 
broader than the body. — A shrub 8-12° high, with numerous scarcely erect 
stems, rarely 3-4' in diameter, and a dark purplish- brown close smooth bark. 
From the Eocky Mountains in latitude 54° to Washington Territory and 
southward to Colorado. — Frequent on stream-banks in the Wahsatch and 
Uintas; 5-6,000 feet altitude. It is 339 Parry, 518 Hall & Harbour, and 
528 Vasey, from Colorado, and was also collected by Nuttall. Kegel makes 
this both the type of his subspecies occidentalis under B. alha^ and his Var. 
humilis of subspecies ^w^yri/em, adding to both certain forms o{ B. papyracea. 
The White Mountain variety of B. papyracea is quite distinct from the pres- 
ent, and cannot be considered as tending to unite the two species. Plate 
XXXY. Fig. 1. End of branch ; natural size. Figs. 2, 3. Scales. Figs. 
4, 5. Seeds ; enlarged four diameters. (1,088.) 
Betula glandulosa, Mx. From Newfoundland and Labrador, North- 
ern New England and the Great Lakes to the Arctic Ocean and Behring 
Strait, Alaska, Oregon, and Colorado. Found on si ream-banks in the Uintas ; 
8-9,000 feet altitude. (1,089.) 
Alnus incana, WilUl., Var. glauca, Ait. Leaves ovate, doubly and 
sharply serrate, obtuse at base or slightly cordate, rarely subcuneate, sub- 
acute or rarely subacuminate ; more or less pubescent on both twigs and 
leaves, or sometimes nearly glabrous ; seeds with a narrow coriaceous mar- 
gin. — From New England to Saskatchewan ; thence south to New Mexico 
